Ricardo picked 3 ½ pints of strawberries and used ½ of them to make jam.

How many pints of strawberries did he use for the jam? Write the answer as a mixed number in simplest form.

Ricardo used ½ of the 3 ½ pints of strawberries, which is 3 ½ * ½ = 1 ¾ pints of strawberries. Answer: \boxed{1\frac{3}{4}}.